Question
Select all the true statements.
Two different substances with crystal structures can be composed of the same chemical elements in the same ratio and also have the same
arrangements of atoms.
Molecules of two different substances can be composed of the same chemical elements but have different numbers of atoms.
Two different substances can be composed of different chemical elements.
Two different substances with crystal structures can be composed of the same chemical elements in the same ratio and also have the same
arrangements of atoms.
Molecules of two different substances can be composed of the same chemical elements but have different numbers of atoms.
Two different substances can be composed of different chemical elements.
Answers
GPT-4o mini
Let's analyze each statement:
1. **Two different substances with crystal structures can be composed of the same chemical elements in the same ratio and also have the same arrangements of atoms.**
- This statement is **false**. If two different substances have the same arrangements of atoms, they are considered the same substance. Different substances cannot have the same atomic arrangement in their crystal structure.
2. **Molecules of two different substances can be composed of the same chemical elements but have different numbers of atoms.**
- This statement is **true**. For example, water (H2O) and hydrogen peroxide (H2O2) are both composed of hydrogen and oxygen, but they have different numbers of atoms, making them different substances.
3. **Two different substances can be composed of different chemical elements.**
- This statement is **true**. By definition, different substances can have entirely different compositions of elements.
Based on the analysis:
- The true statements are:
- **Molecules of two different substances can be composed of the same chemical elements but have different numbers of atoms.**
- **Two different substances can be composed of different chemical elements.**
1. **Two different substances with crystal structures can be composed of the same chemical elements in the same ratio and also have the same arrangements of atoms.**
- This statement is **false**. If two different substances have the same arrangements of atoms, they are considered the same substance. Different substances cannot have the same atomic arrangement in their crystal structure.
2. **Molecules of two different substances can be composed of the same chemical elements but have different numbers of atoms.**
- This statement is **true**. For example, water (H2O) and hydrogen peroxide (H2O2) are both composed of hydrogen and oxygen, but they have different numbers of atoms, making them different substances.
3. **Two different substances can be composed of different chemical elements.**
- This statement is **true**. By definition, different substances can have entirely different compositions of elements.
Based on the analysis:
- The true statements are:
- **Molecules of two different substances can be composed of the same chemical elements but have different numbers of atoms.**
- **Two different substances can be composed of different chemical elements.**